Question

greenish powdery salt on strong heating gave a colourless gas which turns limewater milky and
ves behind a black residue. The black residue dissolves in dilute and warm sulphuric acid to
im a blue coloured solution. The solution on the addition of ammonium hydroxide first forms
dish white precipitate, which dissolves in excess of ammonium hydroxide to form deep blue
louration. Answer the following questions :
(i) Name the cation present in greenish powdery mass.
(11) Name the anion present in greenish powdery mass.
ini) Name the black residue left on heating the powdery mass.
(iv) Write a chemical equation for the reaction between black residue and dilute sulphuric acid.
(V) Write the formula of bluish white precipitate.
[5]​

Answer 1

Answer:

Greenish powdery salt on strong heating gave a colourless gas which turns limewater milky and

ves behind a black residue. The black residue dissolves in dilute and warm sulphuric acid to

im a blue coloured solution. The solution on the addition of ammonium hydroxide first forms

dish white precipitate, which dissolves in excess of ammonium hydroxide to form deep blue

louration

Answer 2

Answer:

please give me the answer anyone